Paper carriage drive



Dec 3, 1935- o. J. sUNDsTRAND PAPER CARRIAGE DRIVE lFiled Oct l5 Patented Dec. 3, 1935 UNITED STATES PATENT .OFFICE PAPER CARRIAGE DRIVE tion of Delaware Application October 13, 1930, Serial No. 488,293

6 Claims.

tion of a bookkeeping machine comprising a crosstabulating carriage arranged tov be driven by means embodying the features of my invention.

Fig. 2 is afragmental sectional view of the means for imparting the return stroke to the carriage.

Fig. 3 is a fragmental rear elevation of the machine.

The paper carriage I may be of any preferred construction and may be supported for movement transversely of the machine frame in any desired manner, as, for example, upon a guide 2 and antifriction rollers 3. In its 'cross-tabulating or working stroke the carriage travels toward the left of the operator, towardl the observer in Fig. 1 and to the right in the rear view shown in Fig. 3. It is moved in 'this direction by means inluding a flexible element such as the draw band 4, the latter being secured at one end to the carriage and running over a drum or guide pulley 5 and thence around a pulley 6 to which it is secured at a suitable point, as, for example, the point 1 in Fig. 3. The drum 5 is rotatably mounted in the stationary framewrk ofthe machine below and close to the path of travel of the carriage. 'I'he pulley 6 is journaled upon a ilxed shaft 8 directly below the drum 5, and is rigidly connected to an internal gear 9 of substantially equivalent diameter. Meshing with said gear is a pinion I0 fixed upon a shaft I I, the gear and pinion constituting in this embodiment of the invention, a preferred form of speed reduction 'gear train. The shaft I I is driven from an electric motor I2 in any preferred manner which permits of slippage or lost motion. Herein I have shown a pulley I3 fixed' upon the rear endof themotor shaft I4 and 'carrying a. belt I5 that runs over a pulley I6. The

sired character, it is herein shown as comprising f a plurality of friction disks, certain of which are connected to rotate with the pulley I6 by means of pins I8, said disks alternating with other disks K well as return itto initial position.

which are splined to the shaft I I. The disks are yieldingly pressed together by means of a spring I 9. By reference to the arrow in Fig. 3, it will be seen that the drive just described operates to drive the carriage in the working direction. The 5 motor I2 operates continuously, except that, if desired, the motor circuit may be arranged to be opened after the lapse of a certain length of time after an operation of the machine.

'I'he means for returning the carriage to its 10 initial position may be of any desired character. Herein I have shown a gear train indicated generally at 20 through which power is transmitted from the forward end of the motor shaft I4 to a vertical shaft 2|. Rotatably mounted upon the 15 upper end of the shaft 2l is a pinion 22 that meshes with a. rack 23 which is fixed to and extends longitudinally of the paper carriage I. The pinion 22 is arranged to be connected to rotate with the shaft 2I by means of a clutch collar 24 20 adapted to engage a clutch face 25 on the pinion 22. The clutch collar 24 is slidably and nonrotatably connected to the shaft 2| by means of a spline 26 (Fig. 2) Means of any ordinary or preferred character may be provided for shifting 25 the clutch collar 24 into and out of engagement with'the pinion 22 either automatically or manually, or both, at any desired point in the crosstabulating movement of the carriage.

It will be seen that when the clutch 'collar 24 3. is shifted into engagement with the pinion 22 the .latter will be driven in the direction to return the paper carriage I to or toward its initial position. Since the gear drive 20 acts positively to drive the paper carriage, it overcomes the friction drive which tends at all times to drive the carriage in the working direction, the clutch II slipping While the clutch collar 24 is in engagement with the pinion 22.

An escapement mechanism of any well-known or preferred construction may be provided to control the movement of the carriage in the working stroke. Herein I have shown tabulating stops 21 mounted on the carriage I and coacting with a 5 stop element 26 suitably mounted 'upon the stationary framework ofthe machine. It willbe understood that -while the carriage is held stationary through the engagement of one ofthe tabulating stops 21 with the stop element 28, the 50 clutch I1 slips as the motor continues to operate.

It will be seen that I have provided a simple and effective mechanism whereby a singlemotor may be caused to cross-tabulate the carriage as Obviously the power train composed oi the elements I3, I6, I0, 9, 6 and 5 effects a great reduction in speed from that of the motor.

I claim as my invention:

1. In a printing machine, the combination of a laterally movable paper carriage, a motor, a constantly acting impositive driving connection between the motor and the carriage for moving the latter in the working direction, and a normally inoperative positive driving connection between the motor and the carriage for returning the carriage toward its initial position.

2. In a printing machine, the combination of a laterally movable paper carriage, a motor, a constantly acting impositive driving connection between the motor and the carriage for moving the latter in one direction, and a positive driving connection between the motor and the carriage for moving the carriage in the opposite direction, said positive connection comprising a power-transmitting member movable into and out of effective position.

3. In a printing machine, a laterally movable paper carriage, a flexible member connected to the carriage, a guide pulley over which said flexible element is arranged to extend, a pulley around which said ilexible element is wound after passing over said guide pulley, an electric motor, a driving connection between the motor and the second pulley effective to propel said carriage in working direction, said driving connection including a friction clutch operating at substantially the speed of said motor, a speed y inoperative connection between said motor and said carriage to drive said carriage in a return direction.

4. In a printing machine, a laterally movable paper carriage, an electric motor, a permanently connected impositive speed-reducing train for transmitting movement from the motor to the carriage to drive the latter in one direction and a positive driving connection between the motor and the carriage for moving the latter in 10 the opposite direction, said positive connection containing a power-transmitting `member movable into and out of effective position.

5. In a printing machine, a laterally movable paper carriage, a driving motor, a permanently operative impositive driving connection between the motor and carriage eiective to move the latter in one direction and a normally inoperative positive driving connection between the motor and the carriage for moving the latter in a reverse direction against the action of said impositive connection.

6. In a printing machine, the combination of a laterally movable carriage, a motor, a permanently enabled impositive driving connection between the motor and the carriage for moving the latter in one direction, a normally disabled positive driving connection between said motor and carriage, and a part operable to enable said positive connection to move said carriage reversely to said iirst mentioned direction against the action of said impositive connection.

OSCAR J. SUNDSTRAND. 

